Oh man, that feeling when you're stopped at a traffic light or an accident causes a sudden slowdown, and in your rearview mirror the car behind you is coming in way too fast but the driver isn't even looking because there's something on his or her lap that's more important. Or the people who think they have a heads-up display because they're holding the phone at the top of the steering wheel while typing on it. The thing that makes it extra scary is that you really can't do a dang thing about it once you're on the road next to these people. Like in the sudden-stop scenario, I try to leave a bit of extra space in front of me and have sometimes needed to use it to give extra stopping space to the texter behind me, but sometimes you're really packed in and all you can do is cross your fingers that the person will finish the message and look up in time.